Examkin

Soru

Zorluk: OrtaAuthor's Primary Purpose

Reverse osmosis (RO) filtration systems are critical for providing potable drinking water in remote field operations where local freshwater is unavailable. Unlike thermal distillation, which requires substantial energy to boil and condense water, reverse osmosis forces pressurized saltwater through a semipermeable membrane. The microscopic pores of the polyamide membrane allow water molecules to pass through while blocking dissolved mineral salts, bacteria, and suspended contaminants. Consequently, modern expeditionary units deploy compact reverse osmosis water purification units (ROWPUs) to generate large volumes of clean water rapidly with minimal fuel consumption.

What is the author's primary purpose in this passage?

  1. A
    to detail the microscopic pore structure of polyamide membranes
  2. to explain how reverse osmosis purification provides an efficient field water supplyCevap
  3. C
    to criticize the excessive fuel consumption of thermal distillation methods
  4. D
    to describe all standard life-support equipment used in expeditionary deployments

Cevap

The author's primary purpose is to explain how reverse osmosis purification provides an efficient field water supply.
The author outlines the functional mechanism of reverse osmosis filtration and emphasizes how its energy efficiency and portability make it an essential solution for generating drinking water in remote deployments.

Adım Adım Çözüm

1
Identify the primary subject and central theme of the passage.
The text focuses on reverse osmosis filtration and its deployment in expeditionary environments.
Establishing the core topic prevents confusing secondary examples with the main topic.
2
Analyze how supporting details contribute to the overarching message.
The author contrasts reverse osmosis with thermal distillation and describes membrane filtration to highlight practical advantages.
Supporting details serve to explain why the technology is effective and chosen for field use.
3
Synthesize the entire text to determine the author's overall communicative purpose.
The text aims to explain how the technology operates to solve a specific logistical requirement efficiently.
The correct primary purpose must encompass the full scope of the passage without being too narrow or broad.

Anahtar Kavram

Author's Primary Purpose
Tahmini Süre:1m 0s
Bu soruyu puanla

Konular

Author's Primary Purpose

Bu konudan daha fazla soru